#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import cgi
import datetime
import wsgiref.handlers
import os 
from google.appengine.ext.webapp import template

from google.appengine.ext import db
from google.appengine.api import users
from google.appengine.ext import webapp

class Greeting(db.Model):
  author = db.UserProperty()
  content = db.StringProperty(multiline=True)
  date = db.DateTimeProperty(auto_now_add=True)

class MainPage(webapp.RequestHandler): 
  def get(self): 
    greetings_query = Greeting.all().order('-date') 
    greetings = greetings_query.fetch(10) 
 
    if users.get_current_user(): 
      url = users.create_logout_url(self.request.uri) 
      url_linktext = 'Logout' 
    else: 
      url = users.create_login_url(self.request.uri) 
      url_linktext = 'Login' 
 
    template_values = { 
      'greetings': greetings, 
      'url': url, 
      'url_linktext': url_linktext, 
      } 
 
    path = os.path.join(os.path.dirname(__file__), 'index.html') 
    self.response.out.write(template.render(path, template_values))

class DataPage(webapp.RequestHandler): 
  def get(self): 
    greetings_query = Greeting.all().order('-date') 
    greetings = greetings_query.fetch(10) 
 
    if users.get_current_user(): 
      url = users.create_logout_url(self.request.uri) 
      url_linktext = 'Logout' 
    else: 
      url = users.create_login_url(self.request.uri) 
      url_linktext = 'Login' 
 
    template_values = { 
      'greetings': greetings, 
      'url': url, 
      'url_linktext': url_linktext, 
      } 
 
    path = os.path.join(os.path.dirname(__file__), 'data.html') 
    self.response.out.write(template.render(path, template_values))

class DataXml(webapp.RequestHandler): 
  def get(self): 
    greetings_query = Greeting.all().order('-date') 
    greetings = greetings_query.fetch(10) 
 
    if users.get_current_user(): 
      url = users.create_logout_url(self.request.uri) 
      url_linktext = 'Logout' 
    else: 
      url = users.create_login_url(self.request.uri) 
      url_linktext = 'Login' 
 
    template_values = { 
      'greetings': greetings, 
      'url': url, 
      'url_linktext': url_linktext, 
      } 
 
    path = os.path.join(os.path.dirname(__file__), 'data.xml') 
    #self.response.headers['Content-Type'] = 'text/xml' 
    self.response.out.write(template.render(path, template_values))
    
class Guestbook(webapp.RequestHandler):
  def post(self):
    greeting = Greeting()

    if users.get_current_user():
      greeting.author = users.get_current_user()

    greeting.content = self.request.get('content')
    greeting.put()
    self.redirect('/')

class DataPost(webapp.RequestHandler):
  def post(self):
    greeting = Greeting()

    if users.get_current_user():
      greeting.author = users.get_current_user()

    greeting.content = self.request.get('content')
    greeting.put()
    self.redirect('/data.html')

application = webapp.WSGIApplication([
  ('/', MainPage),
  ('/data.html', DataPage),
  ('/data.xml', DataXml),
  ('/post', DataPost),
  ('/sign', Guestbook)
], debug=True)


def main():
  wsgiref.handlers.CGIHandler().run(application)


if __name__ == '__main__':
  main()
